In the mail route configuration shown, how does the Protection Server attempt delivery to example.

The correct answer is C. It tries to connect to the destination MTAs starting at the top and working down the list . This answer comes from the route-ordering behavior shown in the screenshot prompt and matches the way administrators are expected to interpret an ordered destination list in Proofpoint route configuration. In a manually defined route list, the order is meaningful, and the server attempts destinations according to that listed order rather than randomly.

This makes operational sense in Mail Flow administration. When administrators define multiple destination MTAs for a domain or route, they usually do so in a preferred sequence to control primary and fallback delivery behavior. Proofpoint’s SMTP relay and MX references explain that mail delivery depends on how destination servers are selected and contacted, and ordered delivery logic is a standard part of controlled routing behavior.

The other options do not match the configured-route interpretation shown by the question. Randomization would defeat the purpose of explicitly ordered host entries. Starting from the bottom of the list is not the behavior indicated by the screen, and ignoring the configured hosts in favor of public MX lookup would undermine the value of manually defining a route in the first place. In the Threat Protection Administrator course, Mail Flow questions like this test whether the student understands that configured route order affects connection attempts. Therefore, the correct answer is C : the Protection Server starts at the top of the list and works downward .